Is it possible to get a wireshark of the call at either end. Acrobits probably cannot be configured for the media ports, but not being able to see why rtp doesnt establish just leads to conjecture.
Have you tried to get a siptrace of the call? I am thinking the wireshark or siptrace will give a clue as to how "late" in the transaction the ack is being received for the media to establish. If it works on wifi, but not on 3g, I think it's safe to assume the carrier is delaying it or changing the source ports (transparent proxy). Timing is all important to media. On Tue, May 11, 2010 at 10:16 AM, Stephen D. Miller <steph...@thinkgear.com>wrote: > > Given that the Acrobits softphone registers with the server successfully > and receives responses from the INVITE, I think it's safe to assume 5060 > isn't being blocked by AT&T in this area. > > All call-handling related traffic (REGISTER, INVITE, etc) appears to be > flowing between the endpoints correctly---just the UDP RTP stream isn't > getting established. And the direction that it's failing (from local > phone to remote) isn't the direction I'd expect it to... > > What I don't understand is how does the local SIP phone knows (or is > supposed to know) that the destination of the outbound RTP stream is > remote (non-LAN and behind a NAT) so that it can address packets > accordingly? > > sdm > > > -----Original Message----- > > From: Nathaniel Watkins [mailto:nwatk...@garrettcounty.org] > > Sent: Tuesday, May 11, 2010 10:13 AM > > To: Stephen D. Miller; sipx-users@list.sipfoundry.org > > Subject: RE: Another remote worker configuration question... > > > > Is you provider blocking port 5060? Might consider > > connecting via vpn first? > > > > -----Original Message----- > > From: sipx-users-boun...@list.sipfoundry.org > > [mailto:sipx-users-boun...@list.sipfoundry.org] On Behalf Of > > Stephen D. Miller > > Sent: Tuesday, May 11, 2010 10:02 AM > > To: sipx-users@list.sipfoundry.org > > Subject: [sipx-users] Another remote worker configuration question... > > > > > > I have a newly installed sipxecs 4.2 system (replaced a > > previously installed v3.10 system). System is behind a NAT > > firewall. All works as expected (internal extension to > > extension calls, outbound calls, inbound calls, etc). I have > > also followed the v4.2 remote worker config guide and > > configured the server accordingly (port forwarding, local > > subnet specified, etc). > > > > I have installed Acrobits SIP client on an iPhone and > > configured it as an extension in sipxecs. Using the local > > WiFi network, the iPhone SIP client registers and can > > call/communicate with any extension as expected. > > > > Using 3G, the Acrobits SIP client registers properly and can > > call internal extensions, but the media streams (RTP) are > > never established. > > > > I have captured the net traffic at the server in the failure > > case and it appears that the RTP traffic inbound from the > > (remote) iPhone is arriving at the sipxecs server and is > > being properly sent on to the internal extension. However, I > > don't see any RTP traffic heading outbound to the iPhone. I > > think this is the problem... > > > > Does anyone have recommendations for further diagnosing this scenario? > > I can post a wireshark capture of the traffic in the failure > > case...if that's helpful. > > > > Thanks in advance- > > > > sdm > > _______________________________________________ > > sipx-users mailing list sipx-users@list.sipfoundry.org List > > Archive: http://list.sipfoundry.org/archive/sipx-users > > Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-users > > sipXecs IP PBX -- http://www.sipfoundry.org/ > > > > This message and any files transmitted with it are intended > > only for the individual(s) or entity named. If you are not > > the intended individual(s) or entity named you are hereby > > notified that any disclosure, copying, distribution or > > reliance upon its contents is strictly prohibited. If you > > have received this in error, please notify the sender, delete > > the original, and destroy all copies. Email transmissions > > cannot be guaranteed to be secure or error-free as > > information could be intercepted, corrupted, lost, destroyed, > > arrive late or incomplete, or contain viruses. Garrett County > > Government therefore does not accept any liability for any > > errors or omissions in the contents of this message, which > > arise as a result of email transmission. > > > > > > Garrett County Government, > > 203 South Fourth Street, Courthouse, Oakland, Maryland 21550 > > www.garrettcounty.org > > > _______________________________________________ > sipx-users mailing list sipx-users@list.sipfoundry.org > List Archive: http://list.sipfoundry.org/archive/sipx-users > Unsubscribe: http://list.sipfoundry.org/mailman/listinfo/sipx-users > sipXecs IP PBX -- http://www.sipfoundry.org/ > -- ====================== Tony Graziano, Manager Telephone: 434.984.8430 sip: tgrazi...@voice.myitdepartment.net Fax: 434.984.8431 Email: tgrazi...@myitdepartment.net LAN/Telephony/Security and Control Systems Helpdesk: Telephone: 434.984.8426 sip: helpd...@voice.myitdepartment.net Fax: 434.984.8427 Helpdesk Contract Customers: http://www.myitdepartment.net/gethelp/ Why do mathematicians always confuse Halloween and Christmas? Because 31 Oct = 25 Dec.
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